Encoder mounting device

Abstract

An encoder mounting device is used for mounting an encoder to the shaft of an apparatus so that the encoder can sense and monitor the rotation of the shaft. The device includes a collar and a plastic ring arranged and designed to prevent metal contact between the encoder and the apparatus. In this manner the mounting device prevents electrical and thermal conduction therebetween.

I claim: 
     
       1. An encoder mounting device for mounting an encoder on a rotating apparatus, said device comprising: a metal collar means;   an insulating ring, one of said collar and insulating ring having rotating apparatus mounting means for mounting said device on said rotating apparatus and encoder securing means for securing said encoder to said device; and   ring securing means for securing said insulating ring to said collar, said ring securing means being constructed and arranged to prevent metal contact from said collar to said encoder.   
     
     
       2. The device of claim 1 wherein said collar includes collar securing means for securing said collar to said rotating apparatus and said ring includes ring securing means for securing said ring to said encoder. 
     
     
       3. The device of claim 1 wherein said ring is made of a material having thermoinsulating and electroinsulating properties. 
     
     
       4. The device of claim 1 wherein said ring is made of a polyetherimide resin. 
     
     
       5. A device for mounting an encoder on a rotating apparatus, said device comprising; a cylindrical collar;   a ring attached to said cylindrical collar;   apparatus securing means for securing one of said ring and collar to said rotating apparatus; and   encoder securing means for securing the other of said ring and collar to said encoder;   wherein said collar and ring are constructed and arranged to prevent thermal and electric conduction between said apparatus rotating and said encoder.   
     
     
       6. The device of claim 5 said wherein said ring is formed with a first set of holes, said device further comprising a first set of screws disposed in said first set of holes for attaching said ring to said collar. 
     
     
       7. The device of claim 6 wherein said first set of screws are constructed and arranged to prevent metal contact between said screws and one of said rotating apparatus and said encoder. 
     
     
       8. The device of claim 6 wherein said ring is provided with a second set of holes and a second set of screws disposed in said second set of holes for attaching said ring to said encoder. 
     
     
       9. The device of claim 8 wherein said second set of screws is arranged and constructed to prevent metal contact between said second set of screws and said collar. 
     
     
       10. The device of claim 5 wherein said collar is made of a metallic material. 
     
     
       11. The device of claim 5 wherein said ring is made of a plastic material. 
     
     
       12. The device of claim 5 wherein said ring is made of a material having thermoinsulating and electroinsulating properties.